Operation Manual

Troubleshooting
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N300 Wireless ADSL2+ Modem Router DGN2200v4
Unless you connect manually, the modem router does not authenticate using PPPoE or
PPPoA until data is transmitted to the network.
Troubleshoot Internet Browsing
If your modem router can obtain an IP address, but your computer is unable to load any web
pages from the Internet:
• Your computer might not recognize any DNS server addresses.
A DNS server is a host on the Internet that translates Internet names (such as www
addresses) to numeric IP
addresses. Typically your ISP provides the addresses of one or
two DNS servers for your use. If you entered a DNS address when you set up the modem
router, reboot your computer, and verify the DNS address. Alternatively, you can
configure your computer manually with DNS addresses, as explained in your operating
system documentation.
• Your computer might not have the modem router configured as its TCP/IP modem router.
If your computer obtains its information from the modem router by DHCP, reboot the
computer, and verify the modem router address.
TCP/IP Network Not Responding
Most TCP/IP terminal devices and routers have a ping utility for sending an echo request
packet to the designated device. The device responds with an echo reply to tell whether a
TCP/IP network is responding to requests.
Test the LAN Path to Your Modem Router
You can ping the modem router from your computer to verify that the LAN path to your
modem router is set up correctly.
 To ping the modem router from a computer running Windows 95 or later:
1. From the Windows taskbar, click the Start button, and select Run.
2. In the field provided, type ping followed by the IP address of the modem router, as in this
example:
ping 192.168.0.1
3. Click OK.
You should see a message like this one:
Pinging <IP address> with 32 bytes of data
If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx